文章摘要
张濬,胡继文,桂雪峰.液态聚有机硅氧烷高速剪切过程中雾化抑制剂[J].精细化工,2020,37(8):
液态聚有机硅氧烷高速剪切过程中雾化抑制剂
Anti-fogging Agent for Liquid polydimethylsiloxane under High Sheering Speed
投稿时间:2020-03-13  修订日期:2020-04-28
DOI:
中文关键词: 有机硅  高速剪切  雾化抑制剂  交联  雾化抑制效率
英文关键词: organosilicone  high-speed shearing  anti-fogging agent  Cross-linking  anti-fogging efficiency
基金项目:广州市科技计划(201802010018)
作者单位E-mail
张濬 中国科学院广州化学所 617295798@qq.com 
胡继文 中国科学院广州化学所 hujiwen@gic.ac.cn 
桂雪峰 中国科学院广州化学有限公司  
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中文摘要:
      液态有机硅在高速涂布过程中容易产生“雾化”现象。采用端乙烯基聚二甲基硅氧烷和含氢聚硅氧烷催化合成交联的有机硅聚二甲基硅氧烷粘弹性液体,对其进行了表征。将这种粘弹性液体作为有机硅高速剪切过程的雾化抑制剂,研究其网络结构对雾化抑制效率的影响。雾化抑制剂的凝胶率受原料物质的量之比n(C=C)∶n(Si—H)影响;当端乙烯基聚二甲基硅氧烷的相对分子质量 从5759增大到33750时,雾化抑制效率从85.9%增加到95.9%;含氢聚硅氧烷的含氢量为5.5 mmol/g 时更有利于雾化抑制效率的提高。这些因素会影响雾化抑制剂的交联网络结构,交联密度低、交联结构整齐会使雾化抑制效率提高。
英文摘要:
      Liquid organosilicon is easy to produce "atomization" in the process of high-speed coating. Cross-linked organosilicon polydimethylsiloxane viscoelastic liquids was adopted as anti-fogging agent synthesized by and hydrogen-containing polysiloxane, and further studied the influence of the network structure on the anti-fogging efficiency. The gel rate of anti-fogging agent was affected by the molar ratio of n(C=C)∶n(Si-HSi—H) in polysiloxane. When the relative molecular mass of vinyl-terminated polydimethylsiloxane increased from 5759 g/mol to 33750 g/mol, the anti-fogging efficiency increased from 85.9% to 95.9%. When the hydrogen content of hydrogen-containing polysiloxane is 5.5 mmol/g, it is more conducive to the improvement of anti-fogging efficiency. These factors will affect the crosslinking network structure of anti-fogging agent, while low cross-linking density and orderly cross-linking structure will improve anti-fogging efficiency.
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